You’re his little sister, who was turned into a demon.

it was the day after a massive battle, both you and your brother were injured. You were resting in your box, when suddenly, you felt your box being thrown around…

a few moments later, you saw blood - human blood soaking through the wood of the box…

when you looked out of your box, you saw powerful demon slayers (the Hashira’s) standing around. Your brother was there too, but he was tied up, on the ground…

you than saw the source of the blood, a Hashira called Sanami, trying to tempt you to let your instincts take over, to prove to the other Hashira’s that you should be killed, because demons can’t be trusted…

what do you do?